SNOW-754087: Remove xfail from if_not_exists tests #4251

Job	Run time
Check linting	50s
Build Wheel File	18s
Build Doc	5m 7s
Test when pandas is not installed macos-3.8-aws	23m 34s
Test FIPS linux-3.8-aws	1h 1m 47s
Test Disable SQL Simplifier macos-3.8-aws	33m 13s
Test linux-3.8-aws	32m 4s
Test Disable SQL Simplifier macos-3.9-aws	27m 15s
Test Disable SQL Simplifier macos-3.10-aws	34m 12s
Test linux-3.8-azure	32m 13s
Test Disable SQL Simplifier macos-3.11-aws	12m 13s
Test linux-3.8-gcp	28m 31s
Test linux-3.9-aws	28m 39s
Test linux-3.9-azure	26m 40s
Test linux-3.9-gcp	30m 24s
Test linux-3.10-aws	26m 34s
Test linux-3.10-azure	26m 54s
Test linux-3.10-gcp	27m 10s
Test linux-3.11-aws	21m 59s
Test linux-3.11-azure	12m 22s
Test linux-3.11-gcp	14m 44s
Test macos-3.8-aws	28m 43s
Test macos-3.8-azure	21m 50s
Test macos-3.8-gcp	30m 22s
Test macos-3.9-aws	34m 52s
Test macos-3.9-azure	28m 31s
Test macos-3.9-gcp	32m 54s
Test macos-3.10-aws	34m 8s
Test macos-3.10-azure	27m 26s
Test macos-3.10-gcp	28m 46s
Test macos-3.11-aws	17m 0s
Test macos-3.11-azure	11m 30s
Test macos-3.11-gcp	14m 39s
Test windows-3.8-aws	39m 43s
Test windows-3.8-azure	30m 54s
Test windows-3.8-gcp	35m 25s
Test windows-3.9-aws	32m 59s
Test windows-3.9-azure	31m 31s
Test windows-3.9-gcp	34m 39s
Test windows-3.10-aws	41m 0s
Test windows-3.10-azure	33m 52s
Test windows-3.10-gcp	35m 30s
Test windows-3.11-aws	21m 24s
Test windows-3.11-azure	16m 50s
Test windows-3.11-gcp	19m 16s
Combine coverage	1m 20s
	19h 51m 47s

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