Update the error identifiers [skip ci]

Author: cedx

src/Sql.Cmdlets/Get-First.cs

@@ -63,7 +63,7 @@ protected override void ProcessRecord() {
 			WriteObject(record);
 		}
 		catch (TargetInvocationException e) {
-			WriteError(new ErrorRecord(e.InnerException, "EmptyResultSet", ErrorCategory.InvalidOperation, null));
+			WriteError(new ErrorRecord(e.InnerException, "GetFirst:TargetInvocation", ErrorCategory.InvalidOperation, null));
 			WriteObject(null);
 		}
 	}

src/Sql.Cmdlets/Get-Scalar.cs

@@ -56,7 +56,7 @@ protected override void ProcessRecord() {
 			WriteObject(value);
 		}
 		catch (TargetInvocationException e) {
-			WriteError(new ErrorRecord(e.InnerException, "ScalarError", ErrorCategory.OperationStopped, null));
+			WriteError(new ErrorRecord(e.InnerException, "GetScalar:TargetInvocation", ErrorCategory.OperationStopped, null));
 			WriteObject(default);
 		}
 	}

src/Sql.Cmdlets/Get-Single.cs

@@ -63,7 +63,7 @@ protected override void ProcessRecord() {
 			WriteObject(record);
 		}
 		catch (TargetInvocationException e) {
-			WriteError(new ErrorRecord(e.InnerException, "EmptyResultSetOrMoreThanOneRecord", ErrorCategory.InvalidOperation, null));
+			WriteError(new ErrorRecord(e.InnerException, "GetSingle:TargetInvocation", ErrorCategory.InvalidOperation, null));
 			WriteObject(null);
 		}
 	}

src/Sql.Cmdlets/Invoke-Query.cs

@@ -63,7 +63,7 @@ protected override void ProcessRecord() {
 			WriteObject(records, enumerateCollection: true);
 		}
 		catch (TargetInvocationException e) {
-			WriteError(new ErrorRecord(e.InnerException, "QueryError", ErrorCategory.OperationStopped, null));
+			WriteError(new ErrorRecord(e.InnerException, "InvokeQuery:TargetInvocation", ErrorCategory.OperationStopped, null));
 		}
 	}
 }