Bump NetCorePal baseline and template version to 3.3.0

[Copilot]

This updates the template to consume NetCorePal 3.3.0 and aligns package/version metadata to 3.3.0 across the repository. It removes version skew between template dependencies and published template versioning.

• Version metadata alignment

  • Updated root package version prefix in eng/versions.props:
    • VersionPrefix: 3.2.0 -> 3.3.0

• NetCorePal dependency baseline

  • Updated central dependency pin in template/Directory.Packages.props:
    • NetCorePalVersion: 3.2.1 -> 3.3.0
  • All NetCorePal.* package versions continue to flow from this central property.

• Documentation sync

  • Updated install example in README.md to reference 3.3.0.

<!-- eng/versions.props -->
<VersionPrefix>3.3.0</VersionPrefix>

<!-- template/Directory.Packages.props -->
<NetCorePalVersion>3.3.0</NetCorePalVersion>

• Fixes use netcorepal 3.3.0 #184

[witskeeper]

@copilot CI报错
Run dotnet dev-certs https --trust
dotnet dev-certs https --trust
shell: /usr/bin/bash -e {0}
env:
DOTNET_ROOT: /usr/share/dotnet
Trusting the HTTPS development certificate was requested. Trust is per-user and may require additional configuration. See https://aka.ms/dev-certs-trust for more information.
[110] For OpenSSL trust to take effect, '$HOME/.aspnet/dev-certs/trust' must be listed in the SSL_CERT_DIR environment variable. For example, export SSL_CERT_DIR="$HOME/.aspnet/dev-certs/trust:/usr/lib/ssl/certs". See https://aka.ms/dev-certs-trust for more information.
There was an error trusting the HTTPS developer certificate. It will be trusted by some clients but not by others.
Error: Process completed with exit code 4.

Run dotnet new uninstall .
The template package '/home/runner/work/netcorepal-cloud-template/netcorepal-cloud-template' is not found.
To list installed template packages use:
dotnet new uninstall

For details on the exit code, refer to https://aka.ms/templating-exit-codes#103
Error: Process completed with exit code 103.

[Copilot]

@copilot CI报错
Run dotnet dev-certs https --trust
dotnet dev-certs https --trust
...

已修复，提交 f91a079：

• 将 dotnet dev-certs https --trust 调整为失败回退到 dotnet dev-certs https，避免 Linux runner 上 trust 返回 4 导致失败。
• 将 dotnet new uninstall . 调整为容错清理（未安装时跳过），避免返回 103 使作业失败。

[witskeeper]

@copilot CI中去掉GaussDB的测试

[Copilot]

@copilot CI中去掉GaussDB的测试

已处理，提交 9bdabd4：已从 CI 的模板测试矩阵中移除 GaussDB 场景，不再在 CI 中执行 GaussDB 相关测试。