Thread: pgsql: Use PG_TEST_TIMEOUT_DEFAULT for pg_regress suite non-elapsing ti

Use PG_TEST_TIMEOUT_DEFAULT for pg_regress suite non-elapsing timeouts.

Currently, only contrib/test_decoding has this property.  Use \getenv to
load the timeout value.

Discussion: https://postgr.es/m/20220218052842.GA3627003@rfd.leadboat.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/766075105c21442418359221e0a0da43040b273c

Modified Files
--------------
contrib/test_decoding/expected/twophase.out | 5 ++++-
contrib/test_decoding/sql/twophase.sql      | 5 ++++-
src/test/regress/expected/stats.out         | 5 ++++-
src/test/regress/sql/stats.sql              | 5 ++++-
4 files changed, 16 insertions(+), 4 deletions(-)