[deps]: Update dotnet monorepo to v9 (major)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
mcr.microsoft.com/dotnet/aspnet	final	major	8.0 -> 9.0
mcr.microsoft.com/dotnet/sdk	stage	major	8.0 -> 9.0

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Configuration

📅 Schedule: Branch creation - "every 2nd week starting on the 2 week of the year before 4am on Monday" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

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• If you want to rebase/retry this PR, check this box

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[bitwarden-bot]

Internal tracking:

• ID: PM-12178
• Link: https://bitwarden.atlassian.net/browse/PM-12178

[bitwarden-bot]

Checkmarx One – Scan Summary & Details – 06cae5c5-ac6e-4412-9541-134073e53c3b

New Issues

Severity	Issue	Source File / Package	Checkmarx Insight
	Missing User Instruction	/Dockerfile: 174	A user should be specified in the dockerfile, otherwise the image will run as root
	Apt Get Install Pin Version Not Defined	/Dockerfile: 210	When installing a package, its pin version should be defined
	Apt Get Install Pin Version Not Defined	/Dockerfile: 210	When installing a package, its pin version should be defined
	Apt Get Install Pin Version Not Defined	/Dockerfile: 54	When installing a package, its pin version should be defined
	Apt Get Install Pin Version Not Defined	/Dockerfile: 210	When installing a package, its pin version should be defined
	Apt Get Install Pin Version Not Defined	/Dockerfile: 210	When installing a package, its pin version should be defined
	Apt Get Install Pin Version Not Defined	/Dockerfile: 210	When installing a package, its pin version should be defined
	Apt Get Install Pin Version Not Defined	/Dockerfile: 210	When installing a package, its pin version should be defined
	Apt Get Install Pin Version Not Defined	/Dockerfile: 210	When installing a package, its pin version should be defined
	Healthcheck Instruction Missing	/Dockerfile: 174	Ensure that HEALTHCHECK is being used. The HEALTHCHECK instruction tells Docker how to test a container to check that it is still working
	Multiple RUN, ADD, COPY, Instructions Listed	/Dockerfile: 248	Multiple commands (RUN, COPY, ADD) should be grouped in order to reduce the number of layers.
	Multiple RUN, ADD, COPY, Instructions Listed	/Dockerfile: 221	Multiple commands (RUN, COPY, ADD) should be grouped in order to reduce the number of layers.

Fixed Issues

Severity	Issue	Source File / Package
	Missing User Instruction	/Dockerfile: 174
	Apt Get Install Pin Version Not Defined	/Dockerfile: 210
	Apt Get Install Pin Version Not Defined	/Dockerfile: 210
	Apt Get Install Pin Version Not Defined	/Dockerfile: 210
	Apt Get Install Pin Version Not Defined	/Dockerfile: 210
	Apt Get Install Pin Version Not Defined	/Dockerfile: 210
	Apt Get Install Pin Version Not Defined	/Dockerfile: 210
	Apt Get Install Pin Version Not Defined	/Dockerfile: 54
	Apt Get Install Pin Version Not Defined	/Dockerfile: 210
	Healthcheck Instruction Missing	/Dockerfile: 174
	Multiple RUN, ADD, COPY, Instructions Listed	/Dockerfile: 221
	Multiple RUN, ADD, COPY, Instructions Listed	/Dockerfile: 248