Implement stable session identifier headers for telemetry #305

Job	Run time
verify	37s
build-system-tests-artifact	6s
system-tests / Get parameters / Get parameters	16s
system-tests / parametric / parametric (1)	4m 18s
system-tests / parametric / parametric (3)	2m 34s
system-tests / parametric / parametric (5)	2m 11s
system-tests / parametric / parametric (2)	4m 46s
system-tests / parametric / parametric (6)	3m 30s
system-tests / parametric / parametric (4)	2m 27s
system-tests / parametric / parametric (7)	2m 40s
system-tests / parametric / parametric (8)	2m 30s
system-tests / Build end-to-end (${{ matrix.weblog.name }})	0s
system-tests / End-to-end #${{ matrix.job.weblog_instance }}	0s
build-linux-bazel	0s
build-linux-cmake	0s
build-windows-cmake	0s
build-windows-bazel	0s
coverage	0s
system-tests / Report failures	0s
	25m 55s

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