Add DeltasSizeWithoutTempAddresses to return uncommitted slab size

[fxamacker]

Description

Add DeltasSizeWithoutTempAddresses() needed for Cadence metering.

Updates https://github.com/dapperlabs/cadence-private-issues/issues/64

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• [x] Targeted PR against main branch
• [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• [x] Code follows the standards mentioned here
• [ ] Updated relevant documentation
• [x] Re-reviewed Files changed in the Github PR explorer
• [x] Added appropriate labels

[codecov-commenter]

Codecov Report

Merging #290 (082d971) into main (d5384d9) will increase coverage by 0.04%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #290      +/-   ##
==========================================
+ Coverage   69.08%   69.12%   +0.04%     
==========================================
  Files          14       14              
  Lines        7306     7320      +14     
==========================================
+ Hits         5047     5060      +13     
- Misses       1624     1627       +3     
+ Partials      635      633       -2     

Impacted Files	Coverage Δ
encode.go	80.64% <ø> (ø)
array_debug.go	54.16% <100.00%> (ø)
basicarray.go	53.55% <100.00%> (ø)
map_debug.go	55.50% <100.00%> (ø)
storable.go	68.18% <100.00%> (+2.60%)	:arrow_up:
storage.go	79.96% <100.00%> (+1.18%)	:arrow_up:
array.go	76.15% <0.00%> (-0.34%)	:arrow_down:

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