[sonic-yang-models]: Fix vlan name pattern incorrect issue

[kuanyu99]

• Original pattern can't accept Vlan1000~Vlan3999. Fix it.

- Why I did it

Try to fix dynamic breakout port configuration function when there is Vlan1000~Vlan3999 exist.

- How I did it

Modify the yang model pattern of the vlan name string

- How to verify it

1. Create a vlan with name, Vlan1000
   config vlan add 1000

2. Breakout the port
   config interface breakout Ethernet0 4x25G

3. It should able to breakout the port

- Which release branch to backport (provide reason below if selected)

- A picture of a cute animal (not mandatory but encouraged)

[jleveque]

@praveen-li: Please review.

[praveen-li]

LGTM, We fix this issue in LKDN and added new tests too, I will raise tests for review.

[praveen-li]

@kuanyu99 : I raised #5165, which has the fix and the test case. If that works for you. We can commit from only PR 5165.
@jleveque

[kuanyu99]

@kuanyu99 : I raised #5165, which has the fix and the test case. If that works for you. We can commit from only PR 5165.
@jleveque

Yes, it works correctly.

[jleveque]

Closing in favor of #5165