pgsql: Symlink pg_replslot robustly on Windows in pg_basebackup test

Symlink pg_replslot robustly on Windows in pg_basebackup test

This reverts commit e9f15bc9. Instead of a hacky solution that didn't
work on Windows, we avoid trying to move the directory possibly across
drives, and instead remove it and recreate it in the new location.

Discussion: https://postgr.es/m/20240707070243.sb77kp4ubowauctz@awork3.anarazel.de

Backpatch to release 14 like the previous patch.

Branch
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REL_15_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/468b2367d2fe29fe1a53bcba408b472dc8f5051b

Modified Files
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src/bin/pg_basebackup/t/010_pg_basebackup.pl | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)