[Servicebus][python] convert to singleapi SDK (Azure#35902)

* Initial plan

* Update ServiceBus readme.python.md to single-api package format

Co-authored-by: msyyc <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>

Author: msyyc

specification/servicebus/resource-manager/readme.python.md

@@ -1,55 +1,21 @@
 ## Python
 
-
-These settings apply only when `--track2` is specified on the command line.
+These settings apply only when `--python` is specified on the command line.
+Please also specify `--python-sdks-folder=<path to the root directory of your azure-sdk-for-python clone>`.
 
 ``` yaml $(python)
+title: ServiceBusManagementClient
 azure-arm: true
 license-header: MICROSOFT_MIT_NO_VERSION
 package-name: azure-mgmt-servicebus
+namespace: azure.mgmt.servicebus
 package-version: 1.0.0b1
-no-namespace-folders: true
 clear-output-folder: true
 ```
 
-### Python multi-api
-
-Generate all API versions currently shipped for this package
-
-
-```yaml $(python)
-multiapi: true
-default-api-version: "2021-11-01"
-clear-output-folder: true
-batch:
-  - tag: package-2022-10-preview
-  - tag: package-2021-11
-  - multiapiscript: true
-```
-
-``` yaml $(multiapiscript)
-output-folder: $(python-sdks-folder)/servicebus/azure-mgmt-servicebus/azure/mgmt/servicebus/
-perform-load: false
-```
-
-### Tag: package-2022-10-preview and python
-
-These settings apply only when `--tag=package-2022-10-preview --python` is specified on the command line.
-Please also specify `--python-sdks-folder=<path to the root directory of your azure-sdk-for-python clone>`.
-
-``` yaml $(tag) == 'package-2022-10-preview'
-namespace: azure.mgmt.servicebus.v2022_10_01_preview
-output-folder: $(python-sdks-folder)/servicebus/azure-mgmt-servicebus/azure/mgmt/servicebus/v2022_10_01_preview
-```
-
-### Tag: package-2021-11 and python
-
-These settings apply only when `--tag=package-2021-11 --python` is specified on the command line.
-Please also specify `--python-sdks-folder=<path to the root directory of your azure-sdk-for-python clone>`.
-
-``` yaml $(tag) == 'package-2021-11'
-namespace: azure.mgmt.servicebus.v2021_11_01
-output-folder: $(python-sdks-folder)/servicebus/azure-mgmt-servicebus/azure/mgmt/servicebus/v2021_11_01
+``` yaml $(python)
+no-namespace-folders: true
+output-folder: $(python-sdks-folder)/servicebus/azure-mgmt-servicebus/azure/mgmt/servicebus
 ```
 
 ``` yaml $(python)