Some changes to section based ring and ViaStacks (Sourcery refactored)

[sourcery-ai]

Pull Request #1475 refactored by Sourcery.

Since the original Pull Request was opened as a fork in a contributor's
repository, we are unable to create a Pull Request branching from it.

To incorporate these changes, you can either:

1. Merge this Pull Request instead of the original, or

2. Ask your contributor to locally incorporate these commits and push them to
   the original Pull Request

   Incorporate changes via command line

   git fetch https://github.com/gdsfactory/gdsfactory pull/1475/head
   git merge --ff-only FETCH_HEAD
   git push

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re-run and update (force-push) this Pull Request with new refactorings as
necessary. If Sourcery finds no refactorings at any point, this Pull Request
will be closed automatically.

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[sourcery-ai]

Sourcery Code Quality Report

❌  Merging this PR will decrease code quality in the affected files by 5.40%.

Quality metrics	Before	After	Change
Complexity	12.61 🙂	19.80 😞	7.19 👎
Method Length	203.89 😞	227.40 ⛔	23.51 👎
Working memory	18.51 ⛔	18.33 ⛔	-0.18 👍
Quality	34.99% 😞	29.59% 😞	-5.40% 👎

Other metrics	Before	After	Change
Lines	984	1214	230

Changed files	Quality Before	Quality After	Quality Change
gdsfactory/components/ring_section_based.py	20.62% ⛔	12.26% ⛔	-8.36% 👎
gdsfactory/components/spiral_heater.py	41.91% 😞	41.71% 😞	-0.20% 👎
gdsfactory/components/via_stack.py	36.65% 😞	30.52% 😞	-6.13% 👎

Here are some functions in these files that still need a tune-up:

File	Function	Complexity	Length	Working Memory	Quality	Recommendation
gdsfactory/components/ring_section_based.py	ring_section_based	44 ⛔	786 ⛔	22 ⛔	7.51% ⛔	Refactor to reduce nesting. Try splitting into smaller methods. Extract out complex expressions
gdsfactory/components/via_stack.py	circular_via_stack	26 😞	504 ⛔	17 ⛔	18.46% ⛔	Refactor to reduce nesting. Try splitting into smaller methods. Extract out complex expressions
gdsfactory/components/via_stack.py	via_stack	22 😞	438 ⛔	21 ⛔	18.51% ⛔	Refactor to reduce nesting. Try splitting into smaller methods. Extract out complex expressions
gdsfactory/components/spiral_heater.py	spiral_racetrack	18 🙂	388 ⛔	23 ⛔	21.00% ⛔	Try splitting into smaller methods. Extract out complex expressions
gdsfactory/components/via_stack.py	via_stack_from_rules	14 🙂	390 ⛔	18 ⛔	27.11% 😞	Try splitting into smaller methods. Extract out complex expressions

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