Modified API of ParametricRegion class

[friyaz]

References to other Issues or PRs

#19320

Brief description of what is fixed or changed

Old API:

Parametricregion((u, v), (u**3, v**2), {u: (0, 1), v: (1, 2)})

New API:

Parametricregion((u**3, v**2), (u, 0, 1), (v, 1, 2))

Also added dimension property to class.

Other comments

Release Notes

• vector
  • Modified API of ParametricIntegral class

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• vector
  • Modified API of ParametricIntegral class (#19580 by @friyaz)

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#### References to other Issues or PRs
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#19320 

#### Brief description of what is fixed or changed
Old API:
```python
Parametricregion((u, v), (u**3, v**2), {u: (0, 1), v: (1, 2)})
```
New API:
```python
Parametricregion((u**3, v**2), (u, 0, 1), (v, 1, 2))
```
Also added dimension property to class. 

#### Other comments


#### Release Notes

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<!-- BEGIN RELEASE NOTES -->
* vector
    * Modified API of ParametricIntegral class

<!-- END RELEASE NOTES -->

Update

The release notes on the wiki have been updated.

[codecov]

Codecov Report

Merging #19580 into master will decrease coverage by 0.006%.
The diff coverage is 95.238%.

@@              Coverage Diff              @@
##            master    #19580       +/-   ##
=============================================
- Coverage   75.642%   75.635%   -0.007%     
=============================================
  Files          654       654               
  Lines       169932    169934        +2     
  Branches     40062     40060        -2     
=============================================
- Hits        128540    128530       -10     
- Misses       35775     35784        +9     
- Partials      5617      5620        +3     

[friyaz]

ping @Upabjojr