Export of internal Abseil changes.

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1f44f8f487aa3afe8248132e4081519e85671965 by CJ Johnson <johnsoncj@google.com>:

Updates ScopedAllocatorWorks test for InlinedVector to not depend on specific byte counts of standard library vectors. It's too brittle in the face of capacity-changing changes to InlinedVector and does not provide signal in those breakages.

PiperOrigin-RevId: 259590332

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fef7589547e9cdd04a254f6ae06e2bd9ec2b35f0 by CJ Johnson <johnsoncj@google.com>:

Updates the implementation of InlinedVector::insert(...) to be exception safe and adds an exception safety tests for insert(...)

PiperOrigin-RevId: 259542968
GitOrigin-RevId: 1f44f8f487aa3afe8248132e4081519e85671965
Change-Id: I514beff56159c9c717f8d29197728011af1fecd7