Add changelogs for the three non-internal changes in cabal 3.6.2

(cherry picked from commit f8f96943)

changelog.d/pr-7650

+synopsis: Make Paths_ modules work with non-standard preludes again
+pr: #7650
+issues: #5962
+significance: significant
+description: {
+
+- Generate Paths_ module with qualified Data.List.last import so that compatibility with non-standard preludes is not regressed compared to cabal 3.4.
+}
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changelog.d/pr-7652

+synopsis: Windows: redo the fix to breakage caused by new autoconf; the wrong fix made cabal sometimes fail with old autoconf
+pr: #7652 #7651
+issues: #7649 #7494
+significance: significant
+description: {
+
+- Reverts #7510 that failed on Windows when used with pre-generated scripts included in packages such as network, time, process.
+- Adds a subtler fix/workaround for the deficiencies of new autoconf versions on Windows.
+}
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changelog.d/pr-7657

+synopsis: Regenerate bootstrap/ with GHC updated from 8.10.4 to 8.10.7
+pr: #7657 #7658
+description: {
+
+- This regenerates bootstrap plans using new package versions and also updating GHC from 8.10.4 to 8.10.7, as requested by GHC HQ.
+}
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