Feat: removed toolchain dependency and set near-sandbox for tests directly in CI.

[mrLSD]

Description

Removed toolchain dependency and set near-sandbox for tests directly in CI.

[aleksuss]

Bump the near-workspaces as well.

[mrLSD]

Bump the near-workspaces as well.

I think it's out of scope for this PR.

[aleksuss]

By bumping near-workspaces you don't need to add this:

- name: Install sandbox
         run: |
           if [[ ! -f ${{ env.NEAR_SANDBOX_BIN_PATH }} ]]; then
             rm -rf nearcore
             git clone --depth 1 --branch 1.35.0 https://github.com/near/nearcore
             cd nearcore
             make sandbox-release
             cp target/release/near-sandbox $HOME/bin/
             cache-util save sandbox:${{ env.NEAR_SANDBOX_BIN_PATH }}          
             cd ../
             rm -rf nearcore
           fi

[mrLSD]

Fully resolved in #37