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Slightly generalize the way tac_tp_bind works and rewrite the
fundamental property for F_mu_ref_conc using tp_ tactics

Previously [tp_alloc] would just delete [j \Mapsto fill K (Alloc e)]
from the context without a replacement.

- Make sure that the whole project compiles

Almost all tactics are implemented for manipulating expressions in
the [j \Mapsto fill K e].

sans examples

Main changes:
- Rewrite cfgG and cfgUR
- Use gen_heap from iris

This reverts commit b498dbc4.

This reverts commit 15005661.

This reverts commit efe1b574.

This reverts commit 9b40c80d.