fix(import): add tracing spans to all import related functions (#8160)

# Which Problems Are Solved

This fix adds tracing spans to all V1 API import related functions. This
is to troubleshoot import related performance issues reported to us.

# How the Problems Are Solved

Add a tracing span to `api/grpc/admin/import.go` and all related
functions that are called in the `command` package.

# Additional Changes

- none

# Additional Context

- Reported by internal communication

internal/command/project_application_key.go

@@ -10,6 +10,9 @@ import (
 )
 
 func (c *Commands) AddApplicationKeyWithID(ctx context.Context, key *domain.ApplicationKey, resourceOwner string) (_ *domain.ApplicationKey, err error) {
+	ctx, span := tracing.NewSpan(ctx)
+	defer func() { span.EndWithError(err) }()
+
 	writeModel, err := c.applicationKeyWriteModelByID(ctx, key.AggregateID, key.ApplicationID, key.KeyID, resourceOwner)
 	if err != nil {
 		return nil, err
@@ -47,6 +50,8 @@ func (c *Commands) AddApplicationKey(ctx context.Context, key *domain.Applicatio
 }
 
 func (c *Commands) addApplicationKey(ctx context.Context, key *domain.ApplicationKey, resourceOwner string) (_ *domain.ApplicationKey, err error) {
+	ctx, span := tracing.NewSpan(ctx)
+	defer func() { span.EndWithError(err) }()
 
 	keyWriteModel := NewApplicationKeyWriteModel(key.AggregateID, key.ApplicationID, key.KeyID, resourceOwner)
 	err = c.eventstore.FilterToQueryReducer(ctx, keyWriteModel)