PR To support DbDataSource for Postgresql

[michaelmairegger]

This PR adds DbDataSource support for postgresql to allow password rotation using UsePeriodicPasswordProvider

This PR allows the following:

var dataSourceBuilder = new NpgsqlDataSourceBuilder(connectionString);

dataSourceBuilder.UsePeriodicPasswordProvider(async (settings, cancellationToken) =>
{
    var sqlServerTokenProvider = new DefaultAzureCredential();
    var tokenAsync = await sqlServerTokenProvider.GetTokenAsync(new TokenRequestContext(scopes: new[] { "https://ossrdbms-aad.database.windows.net/.default" }), cancellationToken);
    return tokenAsync.Token;
},
TimeSpan.FromMinutes(55), // Interval for refreshing the token
TimeSpan.FromSeconds(5));
        
var dbDataSource = dataSourceBuilder.Build();


builder.Services.AddHealthChecks()
    .AddNpgSql(e => dbDataSource);

closes #1813

[michaelmairegger]

@dotnet-policy-service agree

[codecov-commenter]

Codecov Report

Merging #1832 (75642cd) into master (5325c5d) will decrease coverage by 0.02%.
The diff coverage is 80.00%.

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@@            Coverage Diff             @@
##           master    #1832      +/-   ##
==========================================
- Coverage   66.98%   66.96%   -0.02%     
==========================================
  Files         212      212              
  Lines        7744     7750       +6     
  Branches      527      529       +2     
==========================================
+ Hits         5187     5190       +3     
- Misses       2422     2425       +3     
  Partials      135      135              

Flag	Coverage Δ
Npgsql	28.90% <80.00%> (+0.75%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...rc/HealthChecks.NpgSql/NpgSqlHealthCheckOptions.cs	66.66% <33.33%> (-33.34%)	⬇️
...ncyInjection/NpgSqlHealthCheckBuilderExtensions.cs	72.72% <100.00%> (+2.72%)	⬆️
src/HealthChecks.NpgSql/NpgSqlHealthCheck.cs	86.36% <100.00%> (-4.12%)	⬇️

[sungam3r]

@michaelmairegger Thanks.

[michaelmairegger]

@sungam3r when can we expect to get this released?

[sungam3r]

It was released in https://www.nuget.org/packages/AspNetCore.HealthChecks.NpgSql/7.0.0 4 months ago.

[michaelmairegger]

@sungam3r Oops, my bad. Thanks