feat: add getter to return all source chain config #8524

Job	Run time
Detect changes	8s
Define test matrix	6s
Coverage	8m 44s
Foundry Tests automation	58s
Foundry Tests ccip	9m 11s
Forge fmt automation	8s
Foundry Tests functions	1m 35s
Forge fmt ccip	21s
Foundry Tests keystone	46s
Forge fmt functions	2s
Foundry Tests l2ep	58s
Forge fmt keystone	4s
Foundry Tests liquiditymanager	51s
Forge fmt l2ep	3s
Foundry Tests llo-feeds	1m 3s
Forge fmt liquiditymanager	2s
Foundry Tests operatorforwarder	49s
Forge fmt llo-feeds	3s
Foundry Tests shared	58s
Forge fmt operatorforwarder	2s
Foundry Tests transmission	42s
Forge fmt shared	4s
Run static analysis	0s
Forge fmt transmission	2s
Foundry Tests vrf	41s
Forge fmt vrf	5s
	28m 26s

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