tools,icu: read full ICU version info from file

[refack]

ATM on every ICU version bump we need to update these data.
Reading it from a file makes it independant of configre.py changes.

Refs: #23245

---

Manual output:

D:\bin\dev\python27\python.exe configure.py --with-intl=full-icu --download=all
WARNING: * ECMA-402 (Intl) support didn't find ICU in deps/icu..
 <https://sourceforge.net/projects/icu/files/ICU4C/62.1/icu4c-62_1-src.zip>
 Fetch: | 24.1MB total, 24.1MB downloaded   
Checking file integrity with MD5:
MD5:      408854f7b9b58311b68fab4b4dfc80be  deps\icu4c-62_1-src.zip
 Extracting zipfile: deps\icu4c-62_1-src.zip
WARNING: warnings were emitted in the configure phase
Warning: Missing input files:
tools\msvs\genfiles\node_etw_provider.rc
tools\msvs\genfiles\node_etw_provider.h

Process finished with exit code 0

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• documentation is changed or added
• commit message follows commit guidelines