extend tracker test

[arvidn]

to test announce_to_all_trackers and announce_to_all_tiers as well

[codecov-io]

Codecov Report

Merging #4306 into RC_1_2 will decrease coverage by 0.19%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           RC_1_2    #4306     +/-   ##
=========================================
- Coverage   74.26%   74.06%   -0.2%     
=========================================
  Files         439      439             
  Lines       60777    60779      +2     
  Branches     8981     8982      +1     
=========================================
- Hits        45135    45018    -117     
- Misses      11134    11257    +123     
+ Partials     4508     4504      -4

Impacted Files	Coverage Δ
src/utp_stream.cpp	66.11% <0%> (-10.65%)	⬇️
include/libtorrent/utp_socket_manager.hpp	65% <0%> (-5%)	⬇️
src/ut_pex.cpp	54.25% <0%> (-4.61%)	⬇️
src/timestamp_history.cpp	62.96% <0%> (-3.71%)	⬇️
src/packet_buffer.cpp	75.3% <0%> (-1.24%)	⬇️
include/libtorrent/alert_types.hpp	53.84% <0%> (-1.1%)	⬇️
src/alert.cpp	53.82% <0%> (-0.55%)	⬇️
src/string_util.cpp	90.28% <0%> (-0.52%)	⬇️
src/settings_pack.cpp	77.59% <0%> (-0.42%)	⬇️
src/web_peer_connection.cpp	66.28% <0%> (-0.38%)	⬇️
... and 17 more

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