Problem: `grpc.DialContext` and `grpc.WithBlock` functions are deprecated

[jraddaoui]

Is your request related to a problem? Please describe.

After upgrading google.golang.org/grpc from v1.63.2 to v1.65.0, a couple of deprecation warnings are being reported by golangci-lint:

internal/telemetry/traces.go:36:15: SA1019: grpc.DialContext is deprecated: use NewClient instead.  Will be supported throughout 1.x. (staticcheck)
    conn, err := grpc.DialContext(
                 ^
internal/telemetry/traces.go:40:3: SA1019: grpc.WithBlock is deprecated: this DialOption is not supported by NewClient. Will be supported throughout 1.x. (staticcheck)
        grpc.WithBlock(),
        ^
internal/a3m/client.go:21:15: SA1019: grpc.DialContext is deprecated: use NewClient instead.  Will be supported throughout 1.x. (staticcheck)
    conn, err := grpc.DialContext(
                 ^

More info about the deprecation:

• https://github.com/grpc/grpc-go/blob/master/Documentation/anti-patterns.md
• https://github.com/grpc/grpc-go/issues/7090

Describe the solution you'd like

For now, after the changes in https://github.com/artefactual-sdps/enduro/pull/1011, we are ignoring those warnings. But we should consider using grpc.NewClient, which raises a couple of questions:

• Should we check the client connection after creation? Reading the links above it seems unnecessary.
• Should we close the client connection after all? I looks like we should.

Describe alternatives you've considered

Keep ignoring the warning until we upgrade google.golang.org/grpc to version 2.x.