Update s3_auth_test.py

Version 2.5.15

Version 2.5.14

Version 2.5.13

Use _chsize_s on windows to grow file

Looks like "seek after file end and write" doesn't work
correctly in Windows. We have to grow file before.

Met occasionally on GitHub actions run. Could not reproduce
locally.

attach tag to the new test-case hotfix

move test_basic_full_backup => test_full_backup

run it in separate travis action
+ add same test with stream replication

[PBCKP-146] add test for "unchanged cfm is not backuped"

[PBCKP-263] fix for tests.archive.ArchiveTest.test_archive_get_batchi…

…ng_sanity (#532)

[PGPRO-6635] Compatibility fix for older compilers