Support dispatch session state

[weishaolun]

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Change logs

• Add a mechanism to allow for extra data to be dispatched, whether in the kernel or in a extension.
• Add xact stack walk/mutate and cid set functions.

Why are the changes needed?

To allow dispatch session state and set up the session state in a extension.

Does this PR introduce any user-facing change?

If yes, please clarify the previous behavior and the change this PR proposes.

How was this patch tested?

Please detail how the changes were tested, including manual tests and any relevant unit or integration tests.

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[CLAassistant]

All committers have signed the CLA.

[tuhaihe]

Hi @weishaolun thanks for your contribution! BTW, welcome to amend your commit message following our commit message conventions, eg: the commit title should be under 50 words max.

[tuhaihe]

Hi @weishaolun Thanks for your contribution. Please use "rebase" instead of "merge" for your commits to stay up to date with the main branch. Could you clear your commit history before your PR is merged?