chore: bump cloud-sql-proxy to version 2

[ashwin153]

Greptile Summary

Updated the Cloud SQL Proxy installation script to explicitly fetch the latest v2.x release instead of the absolute latest release. This ensures compatibility with version 2 of the Cloud SQL Proxy.

Key changes:

• Switched from /releases/latest endpoint to /releases?per_page=20 to get a list of recent releases
• Added filtering to select only v2.x releases using grep '"v2\.'
• Improved grep pattern specificity by quoting "tag_name" to avoid false matches

The change is straightforward and maintains backward compatibility for users who specify a version explicitly, while ensuring that users with version: "latest" will get the latest v2.x release rather than potentially getting a v1.x release if it was marked as latest.

Confidence Score: 4/5

• This PR is safe to merge with minimal risk
• The change is well-scoped and addresses a specific version targeting issue. The script logic is sound, and the filtering approach is reasonable. Score is 4 instead of 5 because there's a minor edge case where if no v2 releases exist in the first 20 results, the VERSION variable could be empty, leading to a potential failure at download time (though this is unlikely given cloud-sql-proxy has many v2 releases)
• No files require special attention

Important Files Changed

Filename	Overview
src/cloud-sql-proxy/install.sh	Version detection updated to fetch latest v2.x release instead of absolute latest, ensuring compatibility with v2 API

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Start: Check VERSION variable] --> B{VERSION == 'latest'?}
    B -->|Yes| C[Fetch releases list from GitHub API<br/>per_page=20]
    B -->|No| H[Use specified VERSION]
    C --> D[Filter for 'tag_name' fields]
    D --> E[Filter for v2.x releases only<br/>grep 'v2\.']
    E --> F[Take first result<br/>head -1]
    F --> G[Extract version number<br/>remove 'v' prefix]
    G --> H
    H --> I{Check architecture}
    I -->|x86_64| J[Set PLATFORM=amd64]
    I -->|aarch64/armv8| K[Set PLATFORM=arm64]
    I -->|Other| L[Error: unsupported architecture]
    J --> M[Download cloud-sql-proxy binary]
    K --> M
    M --> N[Make executable & create symlink]
    N --> O[End]
    L --> P[Exit with error]

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_{Last reviewed commit: 15a03ec}