runtime-sdk: Use ephemeral key API for transaction encryption keys

[kostko]

No description provided.

[codecov]

Codecov Report

Merging #1187 (2c240c5) into main (c43daf9) will increase coverage by 0.88%.
The diff coverage is 30.23%.

@@            Coverage Diff             @@
##             main    #1187      +/-   ##
==========================================
+ Coverage   65.00%   65.88%   +0.88%     
==========================================
  Files         135      136       +1     
  Lines       12713    12990     +277     
==========================================
+ Hits         8264     8559     +295     
+ Misses       4417     4399      -18     
  Partials       32       32              

Impacted Files	Coverage Δ
runtime-sdk/src/crypto/random.rs	0.00% <0.00%> (ø)
runtime-sdk/src/keymanager.rs	14.51% <0.00%> (-5.94%)	⬇️
runtime-sdk/src/modules/core/mod.rs	72.53% <0.00%> (-0.68%)	⬇️
runtime-sdk/src/callformat.rs	64.34% <42.85%> (-1.54%)	⬇️
runtime-sdk/src/testing/keymanager.rs	82.14% <83.33%> (-0.22%)	⬇️
contract-sdk/specs/token/oas20/src/types.rs	71.42% <0.00%> (ø)
contract-sdk/specs/token/oas20/src/lib.rs	58.25% <0.00%> (+58.25%)	⬆️
contract-sdk/specs/token/oas20/src/helpers.rs	78.97% <0.00%> (+78.97%)	⬆️

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