[fix](timezone) fix timezone parse when there is no tzfile

[zclllyybb]

Proposed changes

Issue Number: close #xxx

When there's no tzfile:
before:

mysql [test]>select convert_tz('2020-12-12 12:00:00', 'Asia/Shanghai', 'America/Los_angeles');
+--------------------------------------------------------------------------------------------------+
| convert_tz(cast('2020-12-12 12:00:00' as DATETIMEV2(0)), 'Asia/Shanghai', 'America/Los_angeles') |
+--------------------------------------------------------------------------------------------------+
| NULL                                                                                             |
+--------------------------------------------------------------------------------------------------+
1 row in set (0.03 sec)

after：

mysql [test]>select convert_tz('2020-12-12 12:00:00', 'Asia/Shanghai', 'America/Los_angeles');
+--------------------------------------------------------------------------------------------------+
| convert_tz(cast('2020-12-12 12:00:00' as DATETIMEV2(0)), 'Asia/Shanghai', 'America/Los_angeles') |
+--------------------------------------------------------------------------------------------------+
| 2020-12-11 20:00:00                                                                              |
+--------------------------------------------------------------------------------------------------+
1 row in set (0.03 sec)

It tested in docker.

Further comments

If this is a relatively large or complex change, kick off the discussion at [email protected] by explaining why you chose the solution you did and what alternatives you considered, etc...

[zclllyybb]

run buildall

[zclllyybb]

@jacktengg PTAL

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 36.83% (7981/21667)
Line Coverage: 28.86% (64050/221936)
Region Coverage: 27.75% (33239/119779)
Branch Coverage: 24.37% (17038/69912)
Coverage Report: http://coverage.selectdb-in.cc/coverage/7eded1590adefe241ca142c831f67146dfab8b8d_7eded1590adefe241ca142c831f67146dfab8b8d/report/index.html

[doris-robot]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 46.79 seconds
stream load tsv: 614 seconds loaded 74807831229 Bytes, about 116 MB/s
stream load json: 21 seconds loaded 2358488459 Bytes, about 107 MB/s
stream load orc: 64 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 32 seconds loaded 861443392 Bytes, about 25 MB/s
insert into select: 28.7 seconds inserted 10000000 Rows, about 348K ops/s
storage size: 17162138368 Bytes

[jacktengg]

LGTM

[github-actions]

PR approved by anyone and no changes requested.

[HappenLee]

ADD a UT or regression test

[zclllyybb]

run buildall

[HappenLee]

LGTM

[github-actions]

PR approved by at least one committer and no changes requested.

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[xinyiZzz]

LGTM

[doris-robot]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 49.17 seconds
stream load tsv: 615 seconds loaded 74807831229 Bytes, about 116 MB/s
stream load json: 20 seconds loaded 2358488459 Bytes, about 112 MB/s
stream load orc: 64 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 31 seconds loaded 861443392 Bytes, about 26 MB/s
insert into select: 28.7 seconds inserted 10000000 Rows, about 348K ops/s
storage size: 17162235655 Bytes

[zclllyybb]

run buildall

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[doris-robot]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 45.69 seconds
stream load tsv: 595 seconds loaded 74807831229 Bytes, about 119 MB/s
stream load json: 20 seconds loaded 2358488459 Bytes, about 112 MB/s
stream load orc: 64 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 31 seconds loaded 861443392 Bytes, about 26 MB/s
insert into select: 28.8 seconds inserted 10000000 Rows, about 347K ops/s
storage size: 17162378987 Bytes

[zclllyybb]

run buildall

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 36.84% (7999/21715)
Line Coverage: 28.93% (64277/222204)
Region Coverage: 27.80% (33337/119933)
Branch Coverage: 24.41% (17081/69988)
Coverage Report: http://coverage.selectdb-in.cc/coverage/9c4f4cc912547f020698f750bbec4ed183bf1b56_9c4f4cc912547f020698f750bbec4ed183bf1b56/report/index.html

[doris-robot]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 45.28 seconds
stream load tsv: 589 seconds loaded 74807831229 Bytes, about 121 MB/s
stream load json: 20 seconds loaded 2358488459 Bytes, about 112 MB/s
stream load orc: 64 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 31 seconds loaded 861443392 Bytes, about 26 MB/s
insert into select: 28.5 seconds inserted 10000000 Rows, about 350K ops/s
storage size: 17162372610 Bytes

[zclllyybb]

run buildall

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 36.76% (8008/21787)
Line Coverage: 28.81% (64309/223237)
Region Coverage: 27.69% (33361/120459)
Branch Coverage: 24.30% (17086/70306)
Coverage Report: http://coverage.selectdb-in.cc/coverage/9c4f4cc912547f020698f750bbec4ed183bf1b56_9c4f4cc912547f020698f750bbec4ed183bf1b56/report/index.html

[doris-robot]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 45.58 seconds
stream load tsv: 599 seconds loaded 74807831229 Bytes, about 119 MB/s
stream load json: 20 seconds loaded 2358488459 Bytes, about 112 MB/s
stream load orc: 65 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 32 seconds loaded 861443392 Bytes, about 25 MB/s
insert into select: 28.7 seconds inserted 10000000 Rows, about 348K ops/s
storage size: 17162543019 Bytes

[Gabriel39]

LGTM