plugins: keepkey: rm dependence on external keepkeylib

we will instead bundle our own fork, as a git submodule,
https://github.com/spesmilo/electrum-keepkeylib

related https://github.com/spesmilo/electrum/issues/7922
and https://github.com/keepkey/python-keepkey/issues/146
(i.e. upstream keepkeylib is unmaintained)

contrib/build-wine/deterministic.spec

@@ -42,7 +42,6 @@ datas += collect_data_files(f"{PYPKG}.plugins")
 datas += collect_data_files('trezorlib')  # TODO is this needed? and same question for other hww libs
 datas += collect_data_files('safetlib')
 datas += collect_data_files('btchip')
-datas += collect_data_files('keepkeylib')
 datas += collect_data_files('ckcc')
 datas += collect_data_files('bitbox02')
 

contrib/deterministic-build/requirements-hw.txt

@@ -279,10 +279,6 @@ hidapi==0.14.0 \
 idna==3.6 \
     --hash=sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca \
     --hash=sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f
-keepkey==6.3.1 \
-    --hash=sha256:88e2b5291c85c8e8567732f675697b88241082884aa1aba32257f35ee722fc09 \
-    --hash=sha256:cef1e862e195ece3e42640a0f57d15a63086fd1dedc8b5ddfcbc9c2657f0bb1e \
-    --hash=sha256:f369d640c65fec7fd8e72546304cdc768c04224a6b9b00a19dc2cd06fa9d2a6b
 ledger-bitcoin==0.3.0 \
     --hash=sha256:ad9cdeaf33a45562bbd5bae6751025b869a2f81d6eb0267dd062a01f5925a4d5 \
     --hash=sha256:e7c33404d02044c3810b294a510f7ad97bc65ab12dbdd180d873f2b4ebc0711a

contrib/osx/osx.spec

@@ -45,7 +45,6 @@ datas += collect_data_files(f"{PYPKG}.plugins")
 datas += collect_data_files('trezorlib')  # TODO is this needed? and same question for other hww libs
 datas += collect_data_files('safetlib')
 datas += collect_data_files('btchip')
-datas += collect_data_files('keepkeylib')
 datas += collect_data_files('ckcc')
 datas += collect_data_files('bitbox02')
 

contrib/requirements/requirements-hw.txt

@@ -7,7 +7,11 @@ trezor[hidapi]>=0.13.0,<0.14
 safet>=0.1.5
 
 # device plugin: keepkey
-keepkey>=6.3.1
+ecdsa>=0.9
+protobuf>=3.0.0
+mnemonic>=0.8
+hidapi>=0.7.99.post15
+libusb1>=1.6
 
 # device plugin: ledger
 # note: btchip-python only needed for "legacy" protocol and HW.1 support