Add --retry-all-errors option when downloading Go binary

Summary

Added the --retry-all-errors flag to the curl command that downloads the Go binary in install_go.sh

Problem

The current implementation uses curl --retry 15 which only retries on specific transient errors (timeouts, 5xx responses). However, it does not retry on other errors such as:

• Connection reset by peer (TCP/IP issues)
• Temporary DNS resolution failures
• SSL handshake errors
  This can cause builds to fail unnecessarily when transient network issues occur. This behaviour is explained in the issue Supply step do not retry when error is connection reset by peer #626

Solution

Adding --retry-all-errors makes curl retry on any error response, not just the default set. This significantly improves resilience when downloading from the well-known and trusted URL https://buildpacks.cloudfoundry.org/dependencies/go.

Benefits

More reliable builds in environments with intermittent network connectivity
Reduces false-positive build failures due to transient network issues
No breaking changes - the download still validates SHA256 checksum after successful retrieval

Testing

The change maintains existing behavior for successful downloads while adding retry capability for previously non-retryable errors.