Add backtrace capturing, prototype a test err handling #6463

Job	Run time
aries_vcx_core_clippy (credx,vdrtools_wallet)	1m 41s
verify-code-formatting	26s
workflow-setup	25s
aries_vcx_clippy (credx,vdrtools_wallet)	2m 7s
aries_vcx_core_clippy (vdr_proxy_ledger)	1m 54s
aries_vcx_clippy (vdr_proxy_ledger)	4m 8s
workspace_clippy	3m 23s
workflow-setup-check	1s
test-unit-workspace	7m 39s
build-docker-vdrproxy	4m 56s
code-coverage-aries-vcx-integration-modular-libs	15m 0s
test-integration-aries-vcx-mysql	8m 20s
test-integration-aries-vcx	8m 51s
x86_64-unknown-linux-gnu	4m 46s
x86_64-unknown-linux-musl	32m 40s
x86_64-apple-darwin	4m 28s
test-integration-libvcx	6m 38s
test-integration-did-crate	3m 50s
aarch64-apple-darwin	15m 58s
test-integration-node-wrapper (18.x)	15m 4s
test-integration-aries-vcx-vdrproxy	10m 2s
publish-docker-vdrproxy	10s
make-release	0s
publish-napi	1m 9s
publish-node-wrapper	31s
publish-agent-core	42s
	2h 34m 49s

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