upgrade to istio 1.19 (#1211)

Co-authored-by: CH3CHO <ch3cho@qq.com>
Co-authored-by: rinfx <893383980@qq.com>

.github/workflows/build-and-test-plugin.yaml

@@ -20,7 +20,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.19
+          go-version: 1.21.5
     # There are too many lint errors in current code bases
     # uncomment when we decide what lint should be addressed or ignored.
     # - run: make lint
@@ -47,7 +47,7 @@ jobs:
       - name: "Setup Go"
         uses: actions/setup-go@v5
         with:
-          go-version: 1.19
+          go-version: 1.21.5
 
       - name: Setup Rust
         uses: actions-rs/toolchain@v1