wasm_cluster_destroy_spawned_exec_env: avoid "invalid exec env" trap

[yamt]

Possible alternatives:

• Make wasm_cluster_destroy_spawned_exec_env take two exec_env. One for wasm execution and another to specify the target to destroy.

• Make execute functions to switch exec_env as briefly discussed in Use pre-created exec_env for instantiation and module_malloc/free #2047

[yamt]

the windows ci failure looks like #2776

two macos job failures look unrelated too.

Warning: Failed to download action 'https://api.github.com/repos/actions/cache/tarball/e12d46a63a90f2fae62d114769bbf2a179198b5c'. Error: nodename nor servname provided, or not known (codeload.github.com:443)
Warning: Back off 12.507 seconds before retry.
Warning: Failed to download action 'https://api.github.com/repos/actions/cache/tarball/e12d46a63a90f2fae62d114769bbf2a179198b5c'. Error: Operation timed out (api.github.com:443)
Warning: Back off 21.768 seconds before retry.
Error: nodename nor servname provided, or not known (api.github.com:443)

Download action repository 'actions/cache@v3' (SHA:e12d46a63a90f2fae62d114769bbf2a179198b5c)
Warning: Failed to download action 'https://api.github.com/repos/actions/cache/tarball/e12d46a63a90f2fae62d114769bbf2a179198b5c'. Error: nodename nor servname provided, or not known (api.github.com:443)
Warning: Back off 11.773 seconds before retry.
Warning: Failed to download action 'https://api.github.com/repos/actions/cache/tarball/e12d46a63a90f2fae62d114769bbf2a179198b5c'. Error: nodename nor servname provided, or not known (api.github.com:443)
Warning: Back off 24.281 seconds before retry.
Error: nodename nor servname provided, or not known (api.github.com:443)