refactor(Algebra/Order): unbundle group and ring cone

[artie2000]

• Unbundle GroupCone and RingCone using Submonoid.IsMulPointed

The material in Mathlib.Algebra.Group.Submonoid.Support was created to treat uniformly

• positive cones in groups and rings
• pointed cones in vector spaces over an ordered field
• orderings in rings

This PR deprecates the GroupCone and RingCone structures, making use of the predicates Submonoid.IsMulPointed and AddSubmonoid.IsPointed defined in that file instead.

See also #36863 for the analogous change to ring orderings.

---

[github-actions]

PR summary 35471d41e9

Import changes exceeding 2%

%	File
+89.37%	Mathlib.Algebra.Order.Group.Cone
+67.15%	Mathlib.Algebra.Order.Ring.Cone

Import changes for modified files

Dependency changes

File	Base Count	Head Count	Change
Mathlib.Algebra.Order.Group.Cone	348	659	+311 (+89.37%)
Mathlib.Algebra.Order.Ring.Cone	414	692	+278 (+67.15%)

Import changes for all files

Files	Import difference
Mathlib.Algebra.Order.Ring.Cone	278
Mathlib.Algebra.Order.Group.Cone	311

---

Declarations diff

+ IsOrderedMonoid.mkOfSubmonoid
+ IsOrderedRing.mkOfSubsemiring
+ LinearOrder.mkOfSubmonoid
+ PartialOrder.mkOfSubmonoid
+ PartialOrder.mkOfSubmonoid_le_iff
+ Submonoid.oneLE.isMulPointed
+ Submonoid.oneLE.isMulSpanning
+ Subsemiring.nonneg.isPointed
+ Subsemiring.nonneg.isSpanning

You can run this locally as follows

## summary with just the declaration names:
./scripts/pr_summary/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/pr_summary/declarations_diff.sh long <optional_commit>

The doc-module for scripts/pr_summary/declarations_diff.sh contains some details about this script.

---

Increase in tech debt: (relative, absolute) = (3.00, 0.12)

Current number	Change	Type
25	3	disabled deprecation lints

Current commit 85c2dc228d
Reference commit 35471d41e9

You can run this locally as

./scripts/reporting/technical-debt-metrics.sh pr_summary

• The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
• The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).

[joneugster]

Could you please extend the PR description explaining why this is desired or what thee benefits are? And if there is a relevant Zulip discussion, could you please link that, too?

Not sure I'm the right person to review. I'll unassign myself for now but keep this on my list to revisit again