doc: CXSPA-8104 Adjust docs with steps required for migration when An… #13078

Job	Run time
Verify re-run of all jobs	1s
Validate pull_request files	28s
Unit tests	41m 36s
Validations and static code checks	8m 32s
SonarQube Scan	0s
E2E tests for SSR B2C	12m 49s
E2E tests for B2B (1)	13m 34s
E2E tests for B2C (1)	21m 18s
E2E tests for B2B (2)	13m 30s
E2E tests for B2C (2)	21m 19s
E2E tests for B2B (3)	13m 30s
E2E tests for B2C (3)	21m 28s
E2E tests for B2B (4)	13m 30s
E2E tests for B2C (4)	21m 22s
E2E tests for B2C (5)	21m 22s
Build Conclusion	3s
Slack message for failed CI build in Spartacus	1s
	3h 44m 23s

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