Bump version and update CHANGELOG for core v2.19.1, this is a custom … #603

Job	Run time
Run E2E Tests / Validate workflow inputs	3s
Run E2E Tests / Get latest Chainlink release version	1s
Run E2E Tests / Check test configurations	0s
Run E2E Tests / Load test configurations	49s
Run E2E Tests / Get Chainlink image (92f449047d16a7f64df00ba7e57c880e3252d6b8)	5m 32s
Run E2E Tests / Get remote runner test image	0s
Run E2E Tests / Get Chainlink plugins image	0s
Run E2E Tests / ${{ matrix.tests.id }}	0s
Run E2E Tests / smoke/automation_upgrade_test.go:^TestAutomationNodeUpgrade/registry_2_0	13m 57s
Run E2E Tests / smoke/automation_upgrade_test.go:^TestAutomationNodeUpgrade/registry_2_1	17m 0s
Run E2E Tests / smoke/automation_upgrade_test.go:^TestAutomationNodeUpgrade/registry_2_2	17m 47s
Run E2E Tests / After tests	15s
	55m 24s

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