[AINFRA-882] Adopt git-crypt in this repo

[AliSoftware]

• Add encrypted secrets.properties
• Update secrets.properties path in settings.gradle
• Update docs
• Add encrypted sentry.properties
• Add encrypted google-services.json
• Add encrypted debug.keystore
• Add encrypted firebase.secrets.json
• Add encrypted upload.jks
• Add encrypted google-upload-credentials.json
• Delete .configure & .configure-files/
• Call git-crypt unlock in CI

Description

Test Steps

Images/gif

• I have considered if this change warrants release notes and have added them to RELEASE-NOTES.txt if necessary. Use the "[Internal]" label for non-user-facing changes.

[dangermattic]

	1 Message
📖	This PR is still a Draft: some checks will be skipped.

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[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce-Wear Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce-Wear Android
	Platform	⌚️ Wear OS
	Flavor	Jalapeno
	Build Type	Debug
	Commit	e8ca34f
	Direct Download	woocommerce-wear-prototype-build-pr14979-e8ca34f.apk

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce Android
	Platform	📱 Mobile
	Flavor	Jalapeno
	Build Type	Debug
	Commit	e8ca34f
	Direct Download	woocommerce-prototype-build-pr14979-e8ca34f.apk