Summary:
Currently, when someone tries to use `ANALYZE`, they get this warning:
```
WARNING:  'analyze' is a beta feature!
LINE 1: analyze marktable
        ^
HINT:  Set 'ysql_beta_features' yb-tserver gflag to true to suppress the warning for all beta features.
ANALYZE
```

Now that `ANALYZE` has been in tech preview for a few releases, we have made the decision to take it out of beta. This diff removes that warning.
Jira: DB-14804

Test Plan:
Manual test (should be no beta warning):
```
bin/ysqlsh
ysqlsh (15.2-YB-2.25.2.0-b0)
Type "help" for help.

yugabyte=# analyze pg_class;
ANALYZE
```

Automated test:
```
./yb_build.sh --java-test TestPgRegressAnalyze
```

Reviewers: pjain

Reviewed By: pjain

Subscribers: jason, yql

Differential Revision: https://phorge.dev.yugabyte.com/D42765