update rust base image

[hydai]

Fixed #20
Fixed #16

[juntao]

Hello, I am a code review bot on flows.network. Here are my reviews of code commits in this PR.

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Commit 22d4c134e5b2b449e2bc9b2c67e180df3f1e4b62

Key changes:

• The base image has been updated from rust:1.69 to rust:1.71.
• The installation of git and clang packages has been removed.
• The installation of WasmEdge and the AOT compiler has been removed.
• The AOT Wasm binary is now copied using the cp command instead of using the wasmedgec command.

Potential problems:

• The removal of the git and clang packages might affect the build process if they are needed by the project.
• The removal of the installation of WasmEdge and the AOT compiler might affect the functionality of the application if they are required.
• It's unclear why the installation of WasmEdge and the AOT compiler has been removed. This change should be explained in the pull request or accompanied by other relevant changes in the code.
• The build process has been simplified, but it's important to ensure that the simplified process still produces the expected results. It should be verified that the AOT Wasm binary is built correctly using the new approach.