fix(migration): panic when ExecuteMigration fails

[d4x1]

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Summary

What does this PR do?
Panic when ExecuteMigration fails.

Why?

ExecuteMigration is regared as a function that will succeed always, because if it return an error, backend will panic directly.

What problems can be solved?

In these code:

    router.GET("/proceed-db-migration", func(ctx *gin.Context) {
		// Execute database migration
		err := services.ExecuteMigration()
		if err != nil {
			// Return error response
			shared.ApiOutputError(ctx, errors.Default.Wrap(err, "error executing migration"))
			return
		}
		// Return success response
		shared.ApiOutputSuccess(ctx, nil, http.StatusOK)
	})

ExecuteMigration will return an error and the main program will go on.

If there is a new migration script which will return an error when executing , user will have to process db migration.
When this API is called, it returns an error.
But errors are different.
The frist time, it will return from https://github.com/apache/incubator-devlake/blob/main/backend/server/services/init.go#L157.
The second and following times, it will return from https://github.com/apache/incubator-devlake/blob/main/backend/server/services/init.go#L146.

Users can never handle this expect for a reboot.

I think it's unreasonable and this PR just try to fix this.

Does this close any open issues?

There are some related issues #8018 #7992 , but this fix is not the root cause of them.

Screenshots

Include any relevant screenshots here.

It will not return There is a migration in progress. The backend will panic and recover(by gin framework if it's in release mode) directly.

Other Information

Any other information that is important to this PR.

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