ci: run unit tests in separate processes

[yangby-cryptape]

What this PR does / why we need it?

Since Axon uses global variables, run all tests in one process may cause unexpected errors.

With this PR, unit tests will run in separate processes, instead of in threads.

False errors in the unit tests decrease developers' expectation threshold, make developers feel that failed CI checks are reasonable.
Like the story of the boy who cried wolf, it's dangerous.

I have to check CI every time when I see a red cross mark ❌, false errors also increase my mental load.

Let false errors f**k off!

Out of Topic

The $HOME/.cargo/bin has more than 250 MiB binaries, which will be restored from cache, and then they will be overwritten by the binaries that download from internet.

Every workflow will put their tools that be downloaded into that directory, but no workflows will clean that directory.

Execute ls -l ~/.cargo/bin/`.

-rwxr-xr-x 1 runner docker 15474520 Oct 26 18:15 bindgen
-rwxr-xr-x 1 runner docker 14293176 Oct 26 18:15 cargo
-rwxr-xr-x 1 runner docker 28399320 Oct 26 18:15 cargo-audit
-rwxr-xr-x 1 runner docker 14293176 Oct 26 18:15 cargo-clippy
-rwxr-xr-x 1 runner docker 14293176 Oct 26 18:15 cargo-fmt
-rwxr-xr-x 1 runner docker 14293176 Oct 26 18:15 cargo-miri
-rwxr-xr-x 1 runner docker 16653376 Oct 26 18:15 cargo-outdated
-rwxr-xr-x 1 runner docker 12171496 Oct 26 18:15 cbindgen
-rwxr-xr-x 1 runner docker 14293176 Oct 26 18:15 clippy-driver
-rwxr-xr-x 1 runner docker 14293176 Oct 26 18:15 rls
-rwxr-xr-x 1 runner docker 14293176 Oct 26 18:15 rust-analyzer
-rwxr-xr-x 1 runner docker 14293176 Oct 26 18:15 rust-gdb
-rwxr-xr-x 1 runner docker 14293176 Oct 26 18:15 rust-gdbgui
-rwxr-xr-x 1 runner docker 14293176 Oct 26 18:15 rust-lldb
-rwxr-xr-x 1 runner docker 14293176 Oct 26 18:15 rustc
-rwxr-xr-x 1 runner docker 14293176 Oct 26 18:15 rustdoc
-rwxr-xr-x 1 runner docker 14293176 Oct 26 18:15 rustfmt
-rwxr-xr-x 1 runner docker 14293176 Oct 26 18:15 rustup

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CI Settings

CI Usage

Tip: Check the CI you want to run below, and then comment /run-ci.

CI Switch

• Web3 Compatible Tests
• OCT 1-5 And 12-15
• OCT 6-10
• OCT 11
• OCT 16-19
• v3 Core Tests

CI Description

CI Name	Description
Web3 Compatible Test	Test the Web3 compatibility of Axon
v3 Core Test	Run the compatibility tests provided by Uniswap V3
OCT 1-5 | 6-10 | 11 | 12-15 | 16-19	Run the compatibility tests provided by OpenZeppelin

[Flouse]

Let false errors f**k off!

lol