ttljob: skip TestSpanToQueryBoundsCompositeKeys under stress

[annrpom]

This patch skips TestSpanToQueryBoundsCompositeKeys under stress/stressrace as it often hits OOM issues under these conditions.

Epic: none

Release note: None

[cockroach-teamcity]

This change is 

[fqazi]

Reviewed 1 of 1 files at r1, all commit messages.
Reviewable status: complete! 1 of 0 LGTMs obtained (waiting on @annrpom)

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pkg/sql/ttl/ttljob/ttljob_processor_test.go line 227 at r1 (raw file):

	defer leaktest.AfterTest(t)()
	defer log.Scope(t).Close(t)

If deadlock modes also run into trouble we may want skip.UnderDuress()

[annrpom]

flake brought up here

These tests are failing with

test_server_shim.go:159: automatically injected an external process virtual cluster under test; see comment at top of test_server_shim.go for details.

as the only fail state (i.e. there are no other error messages). This is typically indicative of an OOM.

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If deadlock modes also run into trouble we may want skip.UnderDuress()

Tried to navigate engflow/TC to determine if this is the case - I don't believe it is

[annrpom]

TFTR! ('-')7

bors r=fqazi

[craig]

Build succeeded:

• Bazel Essential CI (Cockroach)