…sonic-net#237)

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### Description of PR
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Summary: Testbed feature ask -> Add an L1 switch port allocator on dynamic testbeds. Automates dynamic port shuffling between traffic generators and switch ports to accommodate limited traffic generator interfaces during test runs. This adds an Ansible script and supporting Python utility to parse link mappings and reconfigure L1 switch connections based on testbed inputs. Helps streamline automated test workflows by programmatically managing port connectivity.

Example csv template:

```
# sonic_l1_to_dut_links.csv
StartDevice,StartPort,EndDevice,EndPort,BandWidth
switch1,Ethernet1,l1-switch,P1,100000
switch1,Ethernet2,l1-switch,P2,100000
...

# sonic_l1_to_tgen_links.csv
StartDevice,StartPort,EndDevice,EndPort,BandWidth
tgen1,P1,l1-switch,P3,100000
tgen1,P2,l1-switch,P4,100000
...

# sonic_tgen_links.csv
StartDevice,StartPort,EndDevice,EndPort,BandWidth,VlanID,VlanMode
switch1,Ethernet1,tgen1,P1,100000,,Access
switch1,Ethernet2,tgen1,P2,100000,,Access
...
```

Fixes # (issue)

### Type of change

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- [x] Bug fix
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- [ ] Bug fix
- [X] Testbed and Framework(new/improvement)
- [ ] New Test case
 - [ ] Skipped for non-supported platforms
- [ ] Test case improvement

### Back port request
- [ ] 202012
- [ ] 202205
- [ ] 202305
- [ ] 202311
- [ ] 202405
- [ ] 202411

### Approach
#### What is the motivation for this PR?

#### How did you do it?

#### How did you verify/test it?

#### Any platform specific information?

#### Supported testbed topology if it's a new test case?

### Documentation
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(If it's a new feature, new test case)
Did you update documentation/Wiki relevant to your implementation?
Link to the wiki page?
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…t#9412)

c2aac75 [SFP-Refactor] Fix LP mode API issue (sonic-net#247)
dba17c8 Firmware upgrade CLI support for QSFP-DD transceivers (sonic-net#244)
cd69212 [SFP-Refactor] Implement CMIS Low Power mode (sonic-net#237)
9cea07f Fix RegGroupField decode (sonic-net#245)
6ae1909 Add CMIS QSFP support (sonic-net#246)
c1f317d Gracefully handle CMIS APIs for passive modules (sonic-net#238)
ec7335d fix for firmware functions  (sonic-net#243)
cf2ebe9 Fix RegBitField decode/encode (sonic-net#242)
ef4f2c6 Fix SFP_CABLE_TECH_FIELD (sonic-net#240)
e118644 remove time counting message in functions because function running time could be difficult to predict in unit tests (sonic-net#241)

Signed-off-by: Prince George <prgeor@microsoft.com>

swss:

* e34104e 2018-04-13 | [pfcwd]: support BIG_RED_SWITCH mode (sonic-net#467) (HEAD, origin/201803) [sihuihan88]
* 1f857d5 2018-04-25 | [buffermgr]: remove the item from consumer queue if invalid (sonic-net#489) [sihuihan88]

utilities:

* 0b9bb2b 2018-04-26 | Stop services before pushing new config during "load_minigraph" (sonic-net#247) (HEAD, origin/201803) [Prince Sunny]
* dc119c9 2018-04-18 | [show logging] For following, change 'tail -f' to 'tail -F' in order to retry in the case log is rotated (sonic-net#240) [Joe LeVeque]
* 08da428 2018-04-16 | [pfcwd]: add cli to enable/disable BIG_RED_SWITCH mode (sonic-net#237) [sihuihan88]

Signed-off-by: Guohan Lu <gulv@microsoft.com>