ci: Add a dedicated Cargo profile, test with that

.github/workflows/test_rust.yml

@@ -76,13 +76,13 @@ jobs:
         if: runner.os != 'macOS'
         # TODO: Disallow retries in general once we can allow only after SIGABRT.
         # See: https://github.com/nextest-rs/nextest/issues/1172
-        run: cargo nextest run --workspace --locked --no-fail-fast --retries 2 -j 4 --features imgtests,lzma,jpegxr
+        run: cargo nextest run --cargo-profile ci --workspace --locked --no-fail-fast --retries 2 -j 4 --features imgtests,lzma,jpegxr
         env:
           XDG_RUNTIME_DIR: '' # dummy value, just to silence warnings about it missing
 
       - name: Run tests without image tests
         if: runner.os == 'macOS'
-        run: cargo nextest run --workspace --locked --no-fail-fast -j 4 --features lzma,jpegxr
+        run: cargo nextest run --cargo-profile ci --workspace --locked --no-fail-fast -j 4 --features lzma,jpegxr
         env:
           XDG_RUNTIME_DIR: '' # dummy value, just to silence warnings about it missing
 

Cargo.toml

@@ -97,3 +97,10 @@ inherits = "release"
 
 [profile.web-wasm-extensions]
 inherits = "release"
+
+[profile.ci]
+inherits = "release"
+opt-level = 2
+debug-assertions = true
+overflow-checks = true
+incremental = true