fix(helm): support secrets.existingSecret for core secrets #4037

Job	Run time
typecheck / typecheck	6m 11s
e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)	1m 47s
e2e / 🧪 CLI v3 tests (windows-latest - pnpm)	3m 52s
e2e / 🧪 CLI v3 tests (windows-latest - npm)	3m 26s
units / packages / 🧪 Unit Tests: Packages (1, 1)	7m 44s
e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)	1m 47s
units / webapp / 🧪 Unit Tests: Webapp (3, 8)	6m 28s
units / webapp / 🧪 Unit Tests: Webapp (1, 8)	5m 46s
units / internal / 🧪 Unit Tests: Internal (1, 8)	5m 9s
units / internal / 🧪 Unit Tests: Internal (2, 8)	4m 35s
units / webapp / 🧪 Unit Tests: Webapp (5, 8)	7m 16s
units / webapp / 🧪 Unit Tests: Webapp (4, 8)	3m 30s
units / webapp / 🧪 Unit Tests: Webapp (2, 8)	3m 50s
units / webapp / 🧪 Unit Tests: Webapp (6, 8)	2m 12s
units / webapp / 🧪 Unit Tests: Webapp (8, 8)	2m 9s
units / internal / 🧪 Unit Tests: Internal (8, 8)	2m 28s
units / internal / 🧪 Unit Tests: Internal (3, 8)	5m 20s
units / internal / 🧪 Unit Tests: Internal (4, 8)	4m 54s
units / internal / 🧪 Unit Tests: Internal (5, 8)	3m 37s
units / internal / 🧪 Unit Tests: Internal (6, 8)	4m 32s
units / internal / 🧪 Unit Tests: Internal (7, 8)	4m 47s
units / webapp / 🧪 Unit Tests: Webapp (7, 8)	5m 58s
units / internal / 📊 Merge Reports	26s
units / webapp / 📊 Merge Reports	42s
units / packages / 📊 Merge Reports	26s
	1h 38m 52s

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